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Split
System
Condensers
Installation
Instructions
J
Figure
8
Heat
Pump
Typical
Low
Voltage
Control
Connections
Indoor
ELECTRIC
HEAT
Outdoor
—
Thermostat}
NO
OUTDOOR
THERMOSTAT
|
Unit
Oo
@—
0
—
(Heat/Cool
Relay)
@)
Y1Y
Y
@—
Y
—
(Compressor)
@)
2
@—
wW—
(Electric
Heat)
White
Rogers
1F92
only,
IN
field
jumper
required
Y1-W1.
XXCXB
@—
BI—
(Common
24V)
G
R
@— R—
(24V-Hot)
ital
BL
1
NOTE:
White
Rogers
1F92
|
(2)
(
|
thermostat
cannot
be
used
for
direct
staging
of
electric
INDOOR
ACCESSORY
heat.
Outdoor
thermostat
BLOWER
ELECTRIC
must
be
used
for
staging.
COIL
HEAT
PKG.
@
SPLICE
(WIRE
NUT
OR
SOLDER
AND
TAPE)
(1)
FIRST
STAGE
ELECTRIC
HEAT
ALL
HEATERS
(2)
ADDITIONAL
STAGES,
ELECTRIC
HEAT
STAGE
2 =
BK,
STAGE
3 =
V,
STAGE
4=BR
If
electric
heat
is
not
used,
discard
connection
shown
from
electric
heat
package.
Start-Up
Procedure
Start-up
Procedure
1.
Close
electrical
disconnects
to
energize
system.
2.
Energize
crankcase
heater
on
units
so
equipped.
3.
Set
Thermostat
selector
switch
to
OFF.
4.
Set
room
thermostat
at
desired
temperature.
Be
sure
setpoint
is
below
indoor
ambient
temperature
for
cooling
and
above
indoor
ambient
for
heating.
5.
Set
the
system
switch
of
the
thermostat
on
COOL
and
fan
switch
for
continuous
operation
or
AUTO,
as
desired.
Operate
unit
for
15-20
minutes,
then
check
the
system
re-
frigerant
charge
if
it
was
necessary
to
adjust.
6.
After
the
refrigerant
charge
has
been
adjusted,
the
sys-
tem
is
now
ready
for
continuous
operation.
Final
Refrigeration
Charge
Adjustment
Before
any
adjustment
is
made
to
the
refrigerant
charge,
it
is
imperative
that
the
air
flow
characteristics
of
the
indoor
blower
be
established.
When
checking
indoor
air
flow,
it
is
important
to
remember
that
the
blower
will
deliver
a
higher
quantity
of
air
across
a
dry
coil
versus
a
wet
coil.
Blower
charts
are
calculated
with
a
dry
coil.
Recommended
air
flow
for
installations
of
cooling
units
and
heat
pumps
is
350-450
CFM
per
ton
(12,000
BTUH)
through
a
wet
coil.
Refer
to
indoor
unit
installation
instruc-
tions
for
proper
methods
of
determining
air
flow
and
blower
performance.
To
Check
System
Refrigerant
Charge
(Superheat
Method),
Cooling
Only
NOTE:
On
units
with
two
speed
fan
control
the fan
will
be
on
low
speed
if
the
temperature
is
below
83°
F.
Pull
one
of
the
yellow
low
voltage
wires
off
the fan
control
and
the
unit
will
default
to
high
speed
fan
for
servicing.
Reconnect
wire
after
checking.
1.
Attach
an
accurate
temperature
sensing
device
to
the
suction
line
approximately
4”
-
6”
away
from
the
suction
line
service
valve.
The
temperature
sensing
device
should
be
clamped
securely
to
the
suction
line,
on
a
horizontal
plane
(between
9
&
3
O'clock)
and
insulated.
Record
the
suction
line
temperature.
Lo]
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